History of Internet
General
Network models
Ethernet(Spurgeon)
TCP/IP
SONET (SDH)
Networking Resources (google)
T1(DS1): 1.154Mbps, T3(DS3): 45Mbps, OC3: 155Mbps, OC12: 622Mbps, OC48: 2.4Gbps, OC192: 9.6Gbps.
Unix comands: ping, traceroute, dig, host